Improvement in rock-drills



IINiTnD STATES PATENT Gamen.

JOHN PHILLIPS AND ALBERT TSCHOP, OF SIDDONSBURG, PENNSYLVANIA.

IMPROVEMENT IN ROCK-DRILLS.

Specification forming part of Letters Patent No. 43,523, dated July 12,1864.

To all whom, it may concern:

Be it known that we, JOHN PHILLIPS and ALBERT Tscnor, of Siddonsburg, inthe county of York and State of Pennsylvania, haveinvented a new andImproved Rock-Drill; and we do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe accompanying drawings, making a part of this specitication, inwhich- I Figure l is a front elevation of our invention 5 Fig. 2, a sidesectional View of the same, taken in the line x, Fig. l; Fig. 3, adetached view of a portion of the prop or support of the saine.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention consists in the employment or use of an adjustable frameand an adjust able prop, in connection with a sliding frame, in whichthe drill-operating mechanism is placed, the drill-operating mechanismbeing arranged in a novel way, as hereinafter fully shown and described,whereby the desired work may be performed with facility and theimplement adjusted to drill holes in a vertical direction, or atdifferent degrees of inclination, as may be desired.

To enable those skilled in the art to fully understand and construct ourinvention, we will proceed t0 describe it.

A represents a frame, which is composed of two parallel bars, co a,connected at their upper ends by a cross-bar, b. The lower ends of thebars a a are connected by joints c c with small uprights d d on the baseB. The frame A is retained in proper position by a prop or support, C,which is composed of two parts, c j'. The part e of the prop or supportis formed of two rods, the upper ends of which terminate in hooks fittedloosely in the crossbar b of the frame A. The lower ends of these barsare attached t) a band or socket, h, which is fitted loosely on the partf of the prop or support, so that it ymay slide freely Y thereon. Thepart f of the prop or support is simply a cylindrical rod vhaving aslot, i, made longitudinally through it to admit of a key, D, passingthrough it, said key also passing through the socket h. By means of thiskey passing through the slot t' and socket h the prop or support may beextended or shortened at will and the frame A adjusted either in avertical or in a more or less inclined position. The lower end of thepart f of the prop or support is attached to the base B by means of auniversal joint, ax.

Within the frame A there is fitted a sliding frame, E, which is providedwith a strap, F, the latter being attached to the lower end ofthe frameE, a shown clearly in Fig. 2. Thisstrap F passes through a clamp, j, onthe cross-bar b at the upper end of the t'rame A, said clamp beingsimply a plate or bar attached to b by set-screws 7c lf, by adjustingwhich the pressure on the strap may be regulated as desired.

In the frame E there are placed two parallel shafts, G G', on whichthere are pulleys ZZ, having an endless belt, H, fitted on them. To thebelt H there is attached a projection, m. (Shown clearly in Fig. 2.) Thelower shaft, G', extends beyond one side of the frame E, and has adriving-wheel, I, upon it, and each shaft Gr G is provided with apinion, a, which gears into a wheel, J, on a shaft, K, also fitted inthe frame E, the shaft K extending beyond the frame E, and having acrank, L,- npon it. The opposite end of shaft K has a sliding or movablepinion, o, upon it, which, when necessary, may be thrown in gear with arack, M, on the front side of the frame E. (See Fig. l.)

N is a shaft placed in the frame E, and having a pinion, p, upon it,which gears into the wheel J. This shaft N has-a screw, O, upon it,which gears into a Wormfwheel, P, on a shaft, Q, which is fitted in theframe E parallel with its side pieces, and has a drill, R, attached toits lower end. The shaft Q is allowed to slide or work longitudinally inthe frame E, and said shaft passes loosely through the worm-wheel P, thelatter having a projection at its center, which iits in a groove, q, inthe shaft Q, so as to admit of the shaft rising and fallingindependently ofthe Worm-wheel, and still admitting of the former beingturned by the latter. On the shaft Q there is placed a spiral spring,Q', the lower end of which bears upon a collar, r, on the shaft, and theupper end against the upper cross-piece, c, of frame E. On the lower endof shaft Q, above the lower cross-piece, t, of the frame E, there isalso placed a collar, u.

The operation is as follows: The shaft G (y is rotated by any convenientpower, and the endless belt H is moved in the direction indicated by thearxow 1. The projection m strikes i the collar r and raises the drillshaft Q and when said projection passes the collar r the spring Q forcesdown the shaft Q and cans es the drill R to impinge against the rock.The drill is gradually turned by the screw O and wormwheel P, and thehole may be drilled vertically into the rock, or more or less obliquely,by adjusting the prop or support C, (extending or shortening it-,) so asto give the frame A and shaft Q a vertical or more or less in clinedposition. At the commencement of the operation the frame E is set byadusting the strap F so that the collar u may be a tride above the lowercross-piece, t, ofthe frame E when the drill R rests upon the rock, andafter the rst blow of the drill the frame E is forced down inconsequence of the collar a striking the lower cross-piece, t. The frameE, therefore, is fed down automatically by the action of the drill-shaftQ, thc strap F being allowed to slip in the clampj. After. the hole isbored to the required depth the frameE is run up by shoving the pinion oin gear with the rack M and then turning the crank L. Drills R ofdifferent lengths may be used, according to the depth of hole required.

Having thus described our invention, what We claim as new, and desire tosecure by Letters Patent, is

l. The adjustable frame A, in combination with the adjustable prop orsupport C, constructed and arranged as shown and described, for thepurpose of regulating the position of the frame A and drill .R to boreor drill in a. vertical or in a more or less inclined position, as setforth. Y f

2. The combination of the endless belt H, provided with the projectionm, the collar r on the drill-shaft Q, the screw O on shaft N,

and the worm-wheel l? on shaft Q, all arrangedY in the sliding frame E,to operate as and for the purpose herein set forth.

3. The strap F, attached to the sliding frame E and tted in a clamp,j,on the frame A, in combination with the collar u on the shaft Q, arranged-in relation with thelower crosspiece, t, of the frame E, to operateas and for the purpose herein set forth.

4. The rack M on the frame E, in combination with the adjustable orsliding pinion o on the shaft K, for the. purpose of elevating the frameE, as set forth.

JOHN PHILLIPS; ALBERT TscHor.

Witnesses:

JOHN BEATY, AARON B. RENEKER.

